US4273287A - Atomizer head for paint spray guns - Google Patents
Atomizer head for paint spray guns Download PDFInfo
- Publication number
- US4273287A US4273287A US06/068,220 US6822079A US4273287A US 4273287 A US4273287 A US 4273287A US 6822079 A US6822079 A US 6822079A US 4273287 A US4273287 A US 4273287A
- Authority
- US
- United States
- Prior art keywords
- paint spray
- orifice
- paint
- cylindrical member
- spray orifice
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
- B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
Definitions
- the invention pertains to the field of paint spray atomizers.
- atomizer heads Two basic kinds of atomizer heads are known for paint spray guns.
- air type spraying the paint is fed to the exit nozzle almost without pressure and the atomizing as well as the transport to the workpiece is brought about by compressed air.
- airless spraying the paint is brought to the nozzle under a high pressure of, for example, 200 bar, so that the paint atomizes by itself when exiting from the nozzle.
- the paint reaches the workpiece without needing additional compressed air as a result of its kinetic energy.
- a third kind of atomizer head has become known. This is a combined air-airless spray head.
- the paint is maintained under high pressure but not as high pressure as in the case of purely airless paint sprayers. Compressed air is additionally used in lesser quantities of flow than in the case of purely compressed air paint sprayers.
- the inventive combines air-airless atomizer has a body with a centrally located boring wherein paint is transported to a spray orifice.
- the orifice, centrally located, has an elliptical cross-section.
- each compressed air orifice On each side of the paint spray orifice are compressed air orifices. Both compressed air orifices are fed from a single compressed air boring. Each compressed air orifice has a cross-section corresponding in shape to a section of a circle.
- Each compressed air orifice has a length somewhat longer than the length of the paint spray orifice.
- the compressed air orifices are shaped so that an air flow having an elliptical cross-section is set up. This air flow fully encloses the paint spray.
- the two air sprays intersect at their edges, due to the length of the air orifices, thus minimizing the break away of paint drops from the edge of the fan-shaped spray.
- the air screen In addition to assisting in the atomization of the spray, the air screen produces a very high degree of paint deposition on the article being painted.
- FIG. 1 is a schematic representation of the atomizer head in longitudinal section.
- FIG. 2 is a schematic representation of an end view onto the atomizer head of FIG. 1.
- FIGS. 1 and 2 one embodiment of my invention.
- An atomizer head 5 has a nozzle body 10 and an air cap 11 which surrounds the body 10 concentrically.
- the nozzle body 10 possesses an interior boring 12, which is connected to a paint feed conduit 12' shown in phantom.
- the boring 12 terminates at a slot-shaped nozzle opening 13.
- the nozzle or orifice 13 has an essentially elliptical cross-section. Orifices such as the orifice 13 produce a fan-shaped spray pattern and are, in general, designated as fan spray nozzles.
- the orifice 13 is supported by a cylindrical body portion 14 which terminates at a conical surface 15. Surface 15 tapers to the nozzle opening 13.
- the air cap 11 includes two groove-like recesses which are covered by the nozzle body 10 and thus form air channels 16.
- the air channels 16 are connected to a compressed air feed 16' shown in phantom.
- the channels 16 terminate in a circular segment-like air exit opening 17.
- the air orifices 17 are adjacent the cylindrical surface 14 and on
- the air exit openings 17 are arranged opposite the nozzle body 10 and are directed towards the cylindrical part 14 of the nozzle body 10. Opposite the surface of the cylinder part 14, the orifices 17, or respectively, the feed channels 16 are oriented at an angle of approximately 45° with respect to an axis of rotation of the body member 10.
- the orifices 17 are elongated with ends 18a-d.
- the orifices 17 extend parallel to the major axis of the nozzle slot 13 and finally, which is of particular importance, the orifices 17 have a length which exceeds the diameter of the cylinder 14 such that the end sections 18a, b and 18c, d, respectively, of the orifices 17, 17' are located opposite one another directly without the cylindrical surface 14 in between.
- the arc length 19a, b of each of the air orifices 17 should lie between 30° and 80° when measured with respect to the center of the housing 11.
- the atomizer head 5 functions in the following way.
- paint is fed to the nozzle 13 via the boring 12, and paint supply conduit 12'.
- the paint is under a pressure of between 30 and 100 bar.
- the paint then exits from the nozzle orifice 13 in the form of a fan spray, which consists of atomized paint particles.
- compressed air under pressure of, for example 2 bar, is fed to the two segment openings 17.
- the compressed air which is exiting from the middle region of the air orifices 17 strikes the cylindrical surface 14 and is deflected toward the front surface 15 whereby it then assists in atomization of the paint.
- the compressed air surrounds the two fan sides of the paint fan spray in a screening manner.
- the compressed air exiting at the outer ends 18a, b, of the orifice 17 is directed toward compressed air exiting at outer edges 18c, d.
- the air streams from the end points 18a, b intersect the streams from end points 18c, d, thereby providing a closed air screen having an essentially elliptical cross-section with the paint fan-spray centrally located therein.
- the paint fan-spray is completely surrounded by a screening air spray having an oblong elliptical cross-section.
- individual paint drops are inhibited from breaking away from the spray.
- the atomization is improved and additionally, kinetic energy is imparted to the spray to convey it to the article.
- the atomizer head 5 is also suited for electrostatic paint spraying, in which case, the atomizer head 5 itself is designed with an electrode 20 shown in phantom in FIG. 1. All standard electrode arrangements can be used with the spray head 5.
- the atomizer head can have various embodiments.
- the two air feed channels 16 could be brought together into a connected ring channel formed by an interior plane of the air cap 11 and an outer surface of the nozzle body 10.
- the cross-sectional form of the air exit openings 17 need not necessarily be circular segment-shaped. Nevertheless, it is essential that orifices 17 be of such a length that the compressed air streams which flow out of the end regions 18a-d intersect one another such that the air shield surrounding the paint fan-spray is closed at the edges.
Landscapes
- Nozzles (AREA)
- Electrostatic Spraying Apparatus (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2841384 | 1978-09-22 | ||
DE19782841384 DE2841384A1 (de) | 1978-09-22 | 1978-09-22 | Zerstaeuberkopf fuer farbspritzpistolen |
Publications (1)
Publication Number | Publication Date |
---|---|
US4273287A true US4273287A (en) | 1981-06-16 |
Family
ID=6050208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/068,220 Expired - Lifetime US4273287A (en) | 1978-09-22 | 1979-08-20 | Atomizer head for paint spray guns |
Country Status (9)
Country | Link |
---|---|
US (1) | US4273287A (it) |
JP (1) | JPS5544394A (it) |
AR (1) | AR218766A1 (it) |
CH (1) | CH641062A5 (it) |
DE (1) | DE2841384A1 (it) |
FR (1) | FR2436631A1 (it) |
GB (1) | GB2031759A (it) |
HU (1) | HU178135B (it) |
IT (1) | IT1123280B (it) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4618098A (en) * | 1983-11-04 | 1986-10-21 | Graves Spray Supply, Inc. | Fiberglass spray nozzle |
US5072883A (en) * | 1990-04-03 | 1991-12-17 | Spraying Systems Co. | Full cone spray nozzle with external air atomization |
EP0498600A1 (en) * | 1991-02-06 | 1992-08-12 | Minnesota Mining And Manufacturing Company | Spray die for producing spray fans |
US5170941A (en) * | 1989-04-20 | 1992-12-15 | Iwata Air Compressor Mfg. Co., Ltd. | Premixing-type spray gun |
US5217168A (en) * | 1991-07-30 | 1993-06-08 | Wagner Spray Tech Corporation | Air cap for paint spray gun |
US5249746A (en) * | 1990-05-11 | 1993-10-05 | Iwata Air Compressor Mfg. Co., Ltd. | Low pressure paint atomizer-air spray gun |
US5294459A (en) * | 1992-08-27 | 1994-03-15 | Nordson Corporation | Air assisted apparatus and method for selective coating |
US7128283B1 (en) | 2004-02-02 | 2006-10-31 | Shahin Yousef A | Paint spraying nozzle assembly |
US20120240703A1 (en) * | 2011-03-21 | 2012-09-27 | Voth Danny G | Power Transfer Box Lubrication Device |
USD768262S1 (en) | 2015-03-17 | 2016-10-04 | Anest Iwata Corporation | Nozzle |
US20180043376A1 (en) * | 2015-03-06 | 2018-02-15 | Vitaly Ivanovich TITOROV | Device for Spraying Pressurized Material |
US11149734B2 (en) | 2016-08-23 | 2021-10-19 | Hitachi Industrial Equipment Systems Co., Ltd. | Fluid machine |
WO2022130303A1 (en) | 2020-12-18 | 2022-06-23 | 3M Innovative Properties Company | Two-fluid nozzle with an arcuate opening |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3111570C2 (de) * | 1981-03-24 | 1984-12-06 | Erich 7777 Salem Roser | Sprühkopf für Sprühgeräte zum Versprühen von unter Druck zugeführten Flüssigkeiten oder anderen fließfähigen Medien |
DE20017630U1 (de) * | 1999-12-20 | 2001-03-22 | Tevkür, Talip, 13585 Berlin | Farbspritzpistole |
DE102006033007B3 (de) * | 2006-07-17 | 2007-08-30 | Unterschütz Sondermaschinenbau GmbH | Vorrichtung zur Luftkühlung von Presssträngen |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3907202A (en) * | 1973-05-10 | 1975-09-23 | Skm Sa | Spray-gun apparatus for atomizing paint or similar liquids |
US4004733A (en) * | 1975-07-09 | 1977-01-25 | Research Corporation | Electrostatic spray nozzle system |
US4055300A (en) * | 1974-11-14 | 1977-10-25 | Skm | Equipment for spraying paint and the like |
-
1978
- 1978-09-22 DE DE19782841384 patent/DE2841384A1/de not_active Withdrawn
-
1979
- 1979-08-20 US US06/068,220 patent/US4273287A/en not_active Expired - Lifetime
- 1979-09-18 CH CH843279A patent/CH641062A5/de not_active IP Right Cessation
- 1979-09-18 AR AR278092A patent/AR218766A1/es active
- 1979-09-20 FR FR7923418A patent/FR2436631A1/fr not_active Withdrawn
- 1979-09-20 GB GB7932627A patent/GB2031759A/en not_active Withdrawn
- 1979-09-20 JP JP12156679A patent/JPS5544394A/ja active Pending
- 1979-09-21 IT IT25923/79A patent/IT1123280B/it active
- 1979-09-21 HU HU79WA364A patent/HU178135B/hu unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3907202A (en) * | 1973-05-10 | 1975-09-23 | Skm Sa | Spray-gun apparatus for atomizing paint or similar liquids |
US4055300A (en) * | 1974-11-14 | 1977-10-25 | Skm | Equipment for spraying paint and the like |
US4004733A (en) * | 1975-07-09 | 1977-01-25 | Research Corporation | Electrostatic spray nozzle system |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4618098A (en) * | 1983-11-04 | 1986-10-21 | Graves Spray Supply, Inc. | Fiberglass spray nozzle |
US5170941A (en) * | 1989-04-20 | 1992-12-15 | Iwata Air Compressor Mfg. Co., Ltd. | Premixing-type spray gun |
US5072883A (en) * | 1990-04-03 | 1991-12-17 | Spraying Systems Co. | Full cone spray nozzle with external air atomization |
US5249746A (en) * | 1990-05-11 | 1993-10-05 | Iwata Air Compressor Mfg. Co., Ltd. | Low pressure paint atomizer-air spray gun |
EP0498600A1 (en) * | 1991-02-06 | 1992-08-12 | Minnesota Mining And Manufacturing Company | Spray die for producing spray fans |
JP2583780Y2 (ja) | 1991-02-06 | 1998-10-27 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | 低圧高容量スプレー用型 |
US5217168A (en) * | 1991-07-30 | 1993-06-08 | Wagner Spray Tech Corporation | Air cap for paint spray gun |
US5294459A (en) * | 1992-08-27 | 1994-03-15 | Nordson Corporation | Air assisted apparatus and method for selective coating |
US7128283B1 (en) | 2004-02-02 | 2006-10-31 | Shahin Yousef A | Paint spraying nozzle assembly |
US20120240703A1 (en) * | 2011-03-21 | 2012-09-27 | Voth Danny G | Power Transfer Box Lubrication Device |
US8707815B2 (en) * | 2011-03-21 | 2014-04-29 | Deere & Company | Power transfer box lubrication device |
US20180043376A1 (en) * | 2015-03-06 | 2018-02-15 | Vitaly Ivanovich TITOROV | Device for Spraying Pressurized Material |
US10239064B2 (en) * | 2015-03-06 | 2019-03-26 | Vitaly Ivanovich TITOROV | Device for spraying pressurized material |
USD768262S1 (en) | 2015-03-17 | 2016-10-04 | Anest Iwata Corporation | Nozzle |
US11149734B2 (en) | 2016-08-23 | 2021-10-19 | Hitachi Industrial Equipment Systems Co., Ltd. | Fluid machine |
WO2022130303A1 (en) | 2020-12-18 | 2022-06-23 | 3M Innovative Properties Company | Two-fluid nozzle with an arcuate opening |
Also Published As
Publication number | Publication date |
---|---|
GB2031759A (en) | 1980-04-30 |
IT1123280B (it) | 1986-04-30 |
HU178135B (en) | 1982-03-28 |
AR218766A1 (es) | 1980-06-30 |
JPS5544394A (en) | 1980-03-28 |
CH641062A5 (de) | 1984-02-15 |
DE2841384A1 (de) | 1980-04-10 |
IT7925923A0 (it) | 1979-09-21 |
FR2436631A1 (fr) | 1980-04-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |